Now in its sixth edition, this book is the definitive introduction to chemical engineering principles and calculations. A CD-ROM and computer disk are included, offering worked out problems for each section of the book, plus POLYMATH, FORTRAN programs, and YAW's data. Covers the principles and techniques of chemical engineering involving gases, vapors, liquids and solids; shows how to formulate and solve problems in chemical engineering; and describes the proper use of units, physical properties and computers in solving material and energy balances. For chemical engineers and technicians, and professionals in the fields of environmental engineering and petroleum engineering.